diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index cd8311433..d7786c12c 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "2.20.0"
+    ".": "2.21.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37f11d762..cdf4d5dee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [2.21.0](https://github.com/mdn/data/compare/v2.20.0...v2.21.0) (2025-04-11)
+
+
+### Features
+
+* **css:** Update syntax for `@counter-style/additive-symbols` descriptor ([#978](https://github.com/mdn/data/issues/978)) ([61a3662](https://github.com/mdn/data/commit/61a3662b9575960b2f90385745774470b654905b))
+* **css:** Update syntax for `@page/size` descriptor ([#977](https://github.com/mdn/data/issues/977)) ([f56fae7](https://github.com/mdn/data/commit/f56fae746e0d33d3a3913689c2aea9c6bf70dcbb))
+
+
+### Miscellaneous
+
+* **css:** Fix typo ([#975](https://github.com/mdn/data/issues/975)) ([8bf5a33](https://github.com/mdn/data/commit/8bf5a335342a27f105629e578fdedba584d7b750))
+
 ## [2.20.0](https://github.com/mdn/data/compare/v2.19.0...v2.20.0) (2025-04-07)
 
 
diff --git a/package-lock.json b/package-lock.json
index ad9befa5a..2969da15f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mdn-data",
-  "version": "2.20.0",
+  "version": "2.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mdn-data",
-      "version": "2.20.0",
+      "version": "2.21.0",
       "license": "CC0-1.0",
       "devDependencies": {
         "ajv": "^6.12.6",
diff --git a/package.json b/package.json
index b07d67874..fe75a08c4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mdn-data",
-  "version": "2.20.0",
+  "version": "2.21.0",
   "description": "Open Web data by the Mozilla Developer Network",
   "main": "index.js",
   "files": [